Netgear ReadyNAS 8 PRO, Problem with the ReadiNAS administration menu

You need to log in to https://nas-ip-address/admin. The /admin suffix matters - if you leave it out, you are redirected to https://nas-ip-address/shares.  That looks like where you've ended up.

If you are seeing an SSL protocol version or a Cipher mismatch problem, then there are some things you can do.

Use Firefox, and set security.tls.version.min to 1 (browse to about:config and search for the setting).  Then you will be able to log in.  After that you can install this add-on to provide TLS 1.2 support:

• https://github.com/rdynsxtrs/rn4bin/blob/main/apache2/x86/Apache2_2.2.34-x86-0.2.0.bin

That will let you acess the NAS from other browsers (and eliminate the need to set the security version in firefox).

A better solution would be to convert your NAS to run OS-6.  That requires upgrading the RAM to at least 2 GB.  The conversion requires you to make a backup and then restore all the files, as it will reformat your disks.  We can give you more information on this if you want to do the conversion.